4,007 research outputs found
An Empirical Analysis of the Determinants of Marketing Contract Structures for Corn and Soybeans
Contracts serve as coordination mechanisms which allocate value, risk, and decision rightsacross buyers and sellers. The use of marketing contracts in agriculture, specifically for crop production,has been increasing over the past decade. This study investigates the determinants ofagricultural marketing contract design employing data from the USDA’s Agricultural ResourceManagement Survey. Models are estimated to analyze the association between producer and contractorcharacteristics, the decision to produce under contract, and the types of contract structuresobserved in practice, while controlling for the potential for endogenous matching betweencontracting parties. Results indicate that while certain producer characteristics are significantlyassociated with the decision to produce corn or soybeans under contract, there is no significantassociation between those characteristics and specific contract attributes.
Cross-training Christians for rural servant-leadership : an exploration of the role of a congregation in nurturing leadership in the community of Wessington Springs, South Dakota
This study explores the relationship between what is learned and experienced in the Christian faith community and people’s involvement in collaborative leadership within the rural community of Wessington Springs, South Dakota. The author makes use of Martin Luther’s theology of the cross and his teachings regarding Christian vocation, including the calling of parents as family leaders. This approach to leadership development employs a missional ecclesiology, with attention to the Triune God’s transformative, sending work in the world, and examines contributions from knowledge about civil society and human and social capital. Asset mapping is examined as a tool for leadership development
WAMDII observation of an auroral atmosphere wave event
Field tests of WAMDII (Wide Angle Michelson Doppler Imaging Interferometer) on February 23 to 24, 1984 in Saskatoon produced wind images of the aurora that show well defined wave structures in lambda 5577. Wavelengths and velocities of these structures suggest an acoustic-gravity wave interpretation, but their short duration warrants their being termed an event. The Dopplergrams are presented with emphasis on the interpretation of the waves and a discussion of possible sources
A comparison of three heuristics to choose the variable ordering for CAD
Cylindrical algebraic decomposition (CAD) is a key tool for problems in real
algebraic geometry and beyond. When using CAD there is often a choice over the
variable ordering to use, with some problems infeasible in one ordering but
simple in another. Here we discuss a recent experiment comparing three
heuristics for making this choice on thousands of examples
Stressful Change in Higher Education: An Interpretive Case Study
Higher education institutions have distinct features within them, and are increasingly faced with external forces that require adaptation and change. The circumstances surrounding the change may impact how change may be experienced as loss, stress or trauma. While the experience of change for an individual may be subjective, common themes may develop within an organization. This study explored the experience with difficult change at a private university in Ukraine, and the change process as described by faculty and staff. The primary source of data was obtained from interviews with fifteen faculty and staff members, including individuals serving in leadership positions. To gain an understanding of the case, it was essential to explore the Ukrainian context, including historical and political factors, as well as aspects of the organization itself. Four main themes emerged from the study that represent the experience with difficult or stressful change: experiences with change were multilayered and multifaceted, external demands led to a crisis of conscience, the change process led to revisiting core values and belief, and faith and spirituality influenced the experience with change. What was discovered in this study was how the change process that involved stress and loss led to introspection and a renewed sense of commitment to the work. The participants displayed a sense of hope and resilience amidst some very challenging circumstances. As the study progressed it appeared I may have been observing individuals and possibly an organization in the process of transformation
Quantified Uncertainty in Thermodynamic Modeling for Materials Design
Phase fractions, compositions and energies of the stable phases as a function
of macroscopic composition, temperature, and pressure (X-T-P) are the principle
correlations needed for the design of new materials and improvement of existing
materials. They are the outcomes of thermodynamic modeling based on the
CALculation of PHAse Diagrams (CALPHAD) approach. The accuracy of CALPHAD
predictions vary widely in X-T-P space due to experimental error, model
inadequacy and unequal data coverage. In response, researchers have developed
frameworks to quantify the uncertainty of thermodynamic property model
parameters and propagate it to phase diagram predictions. In previous studies,
uncertainty was represented as intervals on phase boundaries (with respect to
composition) or invariant reactions (with respect to temperature) and was
unable to represent the uncertainty in eutectoid reactions or in the stability
of phase regions. In this work, we propose a suite of tools that leverages
samples from the multivariate model parameter distribution to represent
uncertainty in forms that surpass previous limitations and are well suited to
materials design. These representations include the distribution of phase
diagrams and their features, as well as the dependence of phase stability and
the distributions of phase fraction, composition activity and Gibbs energy on
X-T-P location - irrespective of the total number of components. Most
critically, the new methodology allows the material designer to interrogate a
certain composition and temperature domain and get in return the probability of
different phases to be stable, which can positively impact materials design
Scheduling language and algorithm development study. Volume 2, phase 2: Introduction to plans programming
A user guide for the Programming Language for Allocation and Network Scheduling (PLANS) is presented. Information is included for the construction of PLANS programs. The basic philosophy of PLANS is discussed, and access and update reference techniques are described along with the use of tree structures
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